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GOVERNMENT OF TAMIL NADU
STANDARD TWO
TERM - I
VOLUME 2
MATHEMATICS
ENVIRONMENTAL SCIENCE
A publication under Free Textbook Programme of Government of Tamil Nadu
Department Of School Education
Untouchability is Inhuman and a Crime
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Government of Tamil Nadu
First Edition - 2019
(Published under New Syllabus in
Trimester Pattern)
NOT FOR SALE
Content Creation
The wise
possess all
State Council of Educational
Research and Training
© SCERT 2019
Printing & Publishing
Tamil NaduTextbook and Educational
Services Corporation
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II
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THE NATIONAL ANTHEM
Jana-gana-mana-adhinayaka jaya he
Bharata-bhagya-vidhata.
Punjaba-Sindhu-Gujarata-Maratha-
Dravida-Utkala-Banga
Vindhya-Himachala-Yamuna-Ganga
Uchchhala-jaladhi-taranga
Tava subha name jage,
Tava Subha asisa mage,
Gahe tava jaya-gatha.
Jana-gana-mangala-dayaka jaya he
Bharata-bhagya-vidhata
Jaya he, jaya he, jaya he,
Jaya jaya, jaya, jaya he.
- Rabindranath Tagore.
III
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தமி ழ ்த் தாய் வாழ்த்து
நீராருங் கடலுடுத்த நிலமடந்தைக் கெழில�ொழுகும்
சீராரும் வதனமெனத் திகழ்பரதக் கண்டமிதில்
தெக்கணமும் அதிற்சிறந்த திராவிடநல் திருநாடும்
தக்கசிறு பிறைநுதலும் தரித்தநறுந் திலகமுமே!
அத்திலக வாசனைப�ோல் அனைத்துலகும் இன்பமுற
எத்திசையும் புகழ்மணக்க இருந்தபெருந் தமிழணங்கே!
த மி ழ ண ங்கே !
உன் சீரிளமைத் திறம் வியந்து செயல் மறந்து வாழ்த்துதுமே!
வ ா ழ்த் து து ம ே !
வ ா ழ்த் து து ம ே !
- ‘மன�ோன்மணியம்’ பெ. சுந்தரனார்.
தமிழ்த்தாய் வாழ்த்து - ப�ொருள்
ஒலி எழுப்பும் நீர் நிறைந்த கடலெனும் ஆடையுடுத்திய நிலமெனும் பெண்ணுக்கு,
அழகு மிளிரும் சிறப்பு நிறைந்த முகமாகத் திகழ்கிறது பரதக்கண்டம். அக்கண்டத்தில்,
தென்னாடும் அதில் சிறந்த திராவிடர்களின் நல்ல திருநாடும், ப�ொருத்தமான பிறை
ப�ோன்ற நெற்றியாகவும், அதிலிட்ட மணம் வீசும் திலகமாகவும் இருக்கின்றன.
அந்தத் திலகத்தில் இருந்து வரும் வாசனைப�ோல, அனைத்துலகமும் இன்பம்
பெறும் வகையில் எல்லாத் திசையிலும் புகழ் மணக்கும்படி (புகழ் பெற்று) இருக்கின்ற
பெருமைமிக்க தமிழ்ப் பெண்ணே! தமிழ்ப் பெண்ணே! என்றும் இளமையாக இருக்கின்ற
உன் சிறப்பான திறமையை வியந்து உன் வயப்பட்டு எங்கள் செயல்களை மறந்து
உன்னை வாழ்த்துவ�ோமே! வாழ்த்துவ�ோமே! வாழ்த்துவ�ோமே!
IV
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Environmental
2Science
Term-1
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Index
Unit Topic Page
1 Our Environment No.
2 My Amazing Body 75
3 Plants Around Us
4 Animals Around Us 86
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E-Book Evaluation Digi Link
Unit www.tntextbooks.in
1 Our Environment
You will learn about
The nature of different
environments-Forests,
Plains, Hills, Ponds, Rivers,
Seas and Deserts
Our earth has different land forms and water bodies like forests,
plains, mountains, hills, deserts, rivers and seas.
There was a big celebration in school for the National Children‛s
Science Congress. Everybody was excited. Students had come from
many schools from all over India. They introduced themselves and
spoke about the places they had come from.
Forest
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Daniel said,”I live near a forest.
A forest has a large number of trees. The ground is covered
with bushes and grass. Streams and ponds are also found in the
forest. It is home to many animals like elephants, tigers, deer,
lions, bears and snakes. Birds like peacocks, doves, sparrows, parrots and
woodpeckers live there. You can hear the different sounds of animals. I
like the forest. It is cool and shady”.
The age of a tree can be Forests are useful to us in many
found by counting the number of ways. We get wood, honey, fruits,
annual growth rings in its trunk. rubber and many other things from
forests.
Annual
Rings Word list
forest, shade, bushes,
sounds, ground, grass, cool
Some birds found in forests can also be seen near our houses.
Put a tick () mark for the birds that you have seen.
Myna Parrot Dove Crow Sparrow Peacock
Plain and Hill
Tharun said, “I come from a farming family.
We live in the plains. A plain is a flat land area. It is warmer
than the hills. Plains are important for growing crops. Without
growing crops, how can we get our food?
Farms get water from the rain, rivers, lakes, ponds and wells. We find
many animals like cows, goats, bullocks, buffalo and many kinds of birds
there. I like to watch the birds”.
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Kamakshi said, “I live in the hills. Word list
A hill is like a mountain but not so high. hill, hill station,
Hills are generally green and beautiful. summer, farming,
It is also much cooler than the plains. crops, step farms
People visit the hill stations especially in
summer”.
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Look at this picture. This hill looks as if steps have been made on it.
Crops are grown in the step farms, also called as terrace farms. Tea and
coffee are grown on some hills.
Udhagamandalam (Ooty) is called the ‘Queen‛ and Kodaikanal is
called the ‘Princess‛ of the hill stations in Tamil Nadu.
Our state animal, the Nilgiri Tahr, is found in the Nilgiri mountains.
Fill in the columns with the given words.
(cool, tea, flat, step farms, warm, sugarcane, hill station,
coffee, high, crops)
Plain Hill
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It is dangerous to get
into the pond to pluck
the lotus and lily
flowers.
Rocks
Turtle
Fish
Frog
Crab Crane
Sulaiman said, “I would like to speak about the pond in my
village. A pond is a place where water collects. It gets filled by
rain. Fishes, insects, snakes, frogs, crabs and turtles live in a
pond. Flowers like water lily and lotus are also found in ponds.
A lake is bigger than a pond”.
Draw the fish as given below and colour it.
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River and Sea
Sea
River
Sultana said, ”I live near a river. I love to watch the river flowing.
It starts its journey on a mountain, follows a path and finally
flows into the sea.
We use river water in many ways. Because of Word list
this, in olden days, people lived near rivers.
Many kinds of fishes, crabs and birds live in river, sea, path,
and around the river. Sometimes boat races boat race, salty
are also held in the river. My brothers like to
participate in the boat races”.
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Journey of a River
Sea Gopal said, “I belong to a family of fisher folk. We live near the
sea. A sea is a large water body. The sea water is salty. We get salt
from the sea. Plants, fishes, turtles,
prawns and crabs live in the sea. We We get
go fishing in the sea using fishing boats pearls from
called Catamarans (Kattumaram) and oysters.
fishing nets”.
Sea
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Put a tick () in the suitable box.
River water is Kattumaram is A river starts
salty. used for fishing. from a sea.
Yes No Yes No Yes No
Fish live only in Turtles live in River water is
a river. the sea. used for farming.
Yes No Yes No Yes No
Desert
Word list
desert, sandy, quiet, sand dune, cactus
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Mewa Ram and Kamala said, “We come from a desert area.
A desert is a hot and sandy place. There are hills of sand called
sand dunes. The Cactus plant grows in the desert since it needs
very little water to live.
Camels are used for travelling in the desert. The camel is called
the ‘Ship of the Desert‛. Since we have very little water, we use
it carefully”.
All the students were happy to know about each other‛s homes
and surroundings. They became aware that they were a part of
nature. They took a pledge to care for the environment and the
natural life around them. Shall we also take such a pledge?
The camel can drink a large amount of water at one go. It can
live without food and water for many days.
Colour the ones which belong to a desert.
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Evaluation
1. Match the following.
a. Desert - Lion
b. Plain - Camel
c. Forest - Fish
d. Pond - Cow
2. Draw a line to connect the land forms with their names.
Desert Hill
River
Forest
Sea Plain
3. Write ‘ T ‛ if True and ‘ F ‘ if False. ()
()
a. Step farming is done in the hills. ()
b. The horse is called the ‘Ship of the Desert‛. ()
c. Lions and tigers are found in the forest.
d. A forest has sand dunes.
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4. Classify the following words.
( Camel, Duck, Tiger, Cactus, Sand, Fish,
Elephant, Water, Lotus, Deer, Tree )
Forest
Pond
Desert
5. Complete the following sentences using the phrases given in
the bracket.
(can drink a lot of water at one go, is full of trees, has step farms,
has salt water, is smaller than a lake)
a. A forest .
b. The sea .
c. A camel .
d. A pond .
e. A hill .
Self Evaluation
I can identify different environments
I take care of my environment
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Unit My Amazing Body
2
Simple Movements You will learn about
Simple movements
Vedha, Yasmin and Rita are friends and Joints
neighbours. They enjoy going home from Role of the sense organs
school together. Come, let us join them. Postures
Stages of growth
“Wow! Look at the ripe mangoes. “Look! A green frog is hopping.
Let us jump and pluck them”. Let us hop too”.
“Oh no! Bits of paper make the “We have reached home.
place untidy. Let us pick them up Bye, dear friends”.
and put them in the bin”. They wave goodbye to each other.
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Do the following actions. d) Trot like a horse
e) Jump like a rabbit
a) Walk like an elephant f) Waddle like a duck
b) Balance like a crane
c) Hop like a frog
Joints
Keep a book on the floor. Now try to pick it up without bending your knees
and back. Can you do it?
Our bones help us stand up straight and give us shape.
Without our bones, we would be floppy.
The place where two or more bones meet is called a joint.
Shoulder
Elbow
Wrist
Knee
Ankle
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We have to bend our body to do many activities. This is made possible by
the joints.
Note for the teacher Try This Out
Ask the students to move their fingers,
wrist, elbow, shoulder, neck, back, knee and
ankle. Let them find out and share which
joints can move in all directions and which
joints have limited movements.
Circle the joints in the given picture.
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Role of the Sense Organs
Observe and Discuss
What are the sense organs that you use to identify the objects given below?
Our senses work together to tell us about the world
we live in. We most often use more than one of our
senses at the same time.
Descriptions relating to Popcorn
Smell Sight Touch Hearing Taste
Nice smell Yellow, Small, Smooth, Pop pop pop, Salty, Spicy
Fluffy Hard, Soft Crunch
The flavour of food is actually a combination of its taste, smell as
well as the texture.
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Sense organs Role of Sense Organs
Eyes Sight - shape, size, colour, distance,depth
Ears Hearing - loud and soft sounds
Nose Smell - pleasant and unpleasant
Skin Touch
Tongue Taste - rough, smooth, soft, hard, fluffy, hot, cold,
sticky
- sweet, sour, salty, spicy, bitter, astringent
Note for the teacher
Let the children see, touch, hear, taste and smell different objects like cotton,
oil, gum, sponge, bell, stone, chair, soap, flowers, agarbathi, lemon, orange, salt, garlic,
beetle nut and sugar. Carefully choose what is given to the children to taste. Ask them to
describe the objects using the words given above.
Write the names of the sense organs related to
the descriptions given.
Eyes Yellow Crunch
Hard Sweet
The skin is the An elephant‛s
largest sense organ trunk is actually a
in our body. long nose.
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Postures
The position of our body in doing various actions is called
posture. There is a correct way and an incorrect way of doing
various actions. Observe the pictures and find out.
Standing Walking
Sitting
Lifting
Always do the actions in the correct manner. A good upright posture
It is good to sit on the floor. prevents backache.
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Stages of Growth
There are three things which make us different from other animals in
the world.
We have an upright posture.
We can communicate using speech.
We can think.
I have grown from being a baby to a six/seven year old child.
I can eat on my own.
I can read, write and draw.
I can play many games.
We all love to play games. Games are of two types; indoor and
outdoor.
Indoor games Outdoor games
Pallankuzhi
Top
(Bambaram)
Dayam Hopscotch
(Pandi)
Draw the other side and complete the letters.
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Tick () the correct posture.
Do it with your friends -- Show the correct posture.
a) sit b) stand c) walk d) lift
Evaluation
1. Complete the sentences using the words given in the brackets.
( looks, sound, smell, feels, tastes )
a) Honey _________ sweet.
b) A feather ________ soft.
c) A Jasmine has a pleasant _____________ .
d) A flower garden _________ beautiful.
e) The cuckoo makes a musical _____________.
2. Write ‘L‛ for those that make loud sounds and ‘S‘ for those that make soft
sounds.
3. Match the following.
a. Sugar -- salty
b. Lemon -- sweet
c. Chilli -- sour
d. Sea water -- spicy
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4. Put a tick () in the appropriate columns. (Can be in more than one column)
Things Rough Soft Hard Fluffy Sticky
Cotton
Gum
Stone
Feather
Wood
Flower
Sponge
Honey
5. Put a tick () for the correct posture and a cross (X) for the incorrect
posture.
6. Name the joints. (Ankle, Knee, Wrist, Elbow)
Self Evaluation
I can do various actions using my body in a correct way
I know the movements of different joints in my body
I can describe objects known through my sense organs
I can identify some stages of growth
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Unit Plants Around Us
3 You will learn about
The parts of a plant
Different kinds of plants
Benefits of plants
Trees as habitats for animals
Parts of a Plant
A group of students went on a field visit to a garden. Meena
looked at a sapling closely and asked her teacher, “One part
of this plant is green while the other part is brown in colour.
Why is it so, teacher?”
The teacher explained, “Our body has different parts such as
hands, legs and head. In the same way, plants also have different
parts. They are of different colours. Let us learn about them”.
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Shoot System www.tntextbooks.in
Let Us DiscussRoot System
Look at a plant. What do you see? Can you guess what the
different parts of the plant do?
Every plant has a root and a shoot system.
Root System
The part of the plant that grows under the ground is called the root
system.
Shoot System
The part of the plant that grows above the ground is called the
shoot system. It consists of stem, leaf, flower and fruit.
Leaf
Grows from the stem
Most are green in
colour
Makes food for the
plant
Flower
Attractive, colourful
Grows from a bud
Has a specific smell
Attracts birds and
insects
Fruit
Develops from the
flower
Some have seeds
Most plants grow from
seeds
Stem
Main part of the shoot
system
Gives support
Root
Fixes the plant in the soil
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Label the parts of a plant. (Flower, Leaf, Stem, Root, Fruit)
Different Kinds of Plants
Look at the picture and name some of the plants
that you know. What else do you observe?
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Plants are of different kinds. They can be grouped based on
the size and nature of their stems.
PLANTS
HERBS SHRUBS CLIMBERS CREEPERS TREES
Word List
small, thin, soft, stem, hard,
weak, support
Herbs
Herbs are small plants with thin and soft stems. Most of them
live for a few months only; e.g., Mint, Coriander, Grass.
Mint Coriander Grass
(Pudina) (Kothamalli) (Pul)
Shrubs
Shrubs are smaller than trees. They have many stems that grow
close to the ground. The stems are thin and hard. Shrubs live for
several years; e.g., Shoe flower, Oleander, Jasmine .
Shoe flower Oleander Jasmine
(Sembaruthi) (Arali) (Malligai)
Note for the teacher: Visit a garden nearby with your students and ask them to observe
different kinds of plants.
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Climbers
Climbers have weak stems and they need support to climb and
grow. Some of them live for a few months only; e.g., Broad beans,
Snake gourd, Ridge gourd.
Broad beans Snake gourd Ridge gourd
(Avaraikkai) (Pudalankai) (Peerkangkai)
Creepers
Creepers are plants that have weak stems. They grow along the
ground and bear large and heavy fruits. Many of them live for a few
months only; e.g., Pumpkin, Watermelon, Muskmelon.
Pumpkin Watermelon Muskmelon
(Poosanikkai) (Tharpoosani) (Mulaam pazham)
Trees
Big and tall plants are called trees. They have hard and thick
woody stems called trunks. Trees have many branches. They live for
many years; e.g., Banyan tree, Coconut tree, Mango tree.
Banyan tree Coconut tree Mango tree
(Ala maram) (Thennai maram) (Ma maram)
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Observe the pictures and complete the table.
Sl.No Plant Colour of the stem Texture of the stem
(green / brown /red) (hard /soft)
1
2
3
4
5
Benefits of Plants
Let Us Discuss
We get vegetables, fruits, cereals, pulses, spices, oil and medicines
from trees, shrubs, herbs, climbers and creepers.
Vegetables
Lady‛s finger Devil‛s fig Bottle gourd
(Vendaikkai) (Sundakkai) (Suraikkai)
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Fruits
Pomegranate Grapes Jackfruit
(Mathulai) (Thiratchai) (Palapazham)
Cereals and Pulses
Rice Wheat Red gram-split
(Arisi) (Kothumai) (Thoovaram paruppu)
Spices
Bay leaves Cardamom Pepper
(Biriyani elai) (Elakkai) (Milagu)
Oils
Coconut oil Castor oil Groundnut oil
(Thengai yennai) (Amanakku yennai) (Kadalai yennai)
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Medicines
Stone breaker Climbing brinjal Eucalyptus
(Keezhanelli) (Toothuvalai) (Thylamaram)
Coconut Oil is used both for cooking and as hair oil.
Find the odd one in the group and put a tick () mark.
a.
b.
c.
d.
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Other Benefits of Plants
We use different parts of the plants in many other ways.
Let us talk about it.
As Fibre
The thread - like structure taken from a plant is called a fibre.
Fibres are used for making ropes and cloth. We use the ropes and cloth
in many ways.
As Plates for Eating
Plantain leaf Areca plate
(Pakku mattai)
As Timber
Teak wood Neem wood Door made from wood
The thick trunks of some trees are used for making doors, windows,
tables, chairs and other things.
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As Cosmetics
Henna Shikakai Aloe veera
(Marudhani) (Katrazhai)
As Household Things
Palm leaves are used to make boxes, baskets and hand fans. Bamboo
is used to make paper, chairs and winnows.
Palm tree Bamboo
Palm leaf box Hand fan Winnow Chair
As Ornamental Plants
Rose Croton Cactus
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Match the plants with their products.
Colour the parts of the plants that you can eat.
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Tree as a Habitat
Let Us Discuss
Observe all the living beings in and around a tree and talk about them.
The tree is a home (habitat) for many small animals such as birds,
insects, squirrels and monkeys. It also gives us shade and clean air.
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Tick () the animals that you see on the given tree.
Evaluation
1. Match the pictures with the words.
HERB
CLIMBER
CREEPER
TREE
SHRUB
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2. Match the following. Climber
Fibre
a. Pumpkin
b. Pepper Creeper
c. Neem Tree Spice
d. Grapes Timber
e. Cotton
3. Fill in the blanks.
a. The part of the plant that grows _______ the soil is called shoot system.
(below / above)
b. The_______ are the green parts of a plant. (root / leaves)
c. Plates can be made from _________ . (areca / neem)
d. Flowers grow from ________ . (buds / fruits)
4. Choose the correct answer and circle it.
a. A plant which gives fibre
(i) Banana (ii) Tulsi (iii) Rose
(iii) Watermelon
b. Example of a creeper - (iii) Greens
(iii) Bamboo plant
(i) Mint (ii) Paddy
c. This is a spice.
(i) Bay leaf (ii) Banana leaf
d. Winnow is got from -
(i) Palm tree (ii) Coconut tree
Self Evaluation
I can name the parts of a plant
I can identify different kinds of plants
I know some uses of plants
I care for the plants that support all life
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4 Animals Around Us
You will learn about
Animals and their homes
Domestic and wild animals
Young ones of animals
Domestic Animals - Farm Animals
Chicku and Ticku are two little sparrows. One day..........
“wMaanpatla,sctteoosdeaaxyrpoCluohnridcekutush”e. “Ogkoatyo, obfuatr”d.on‛t
Chicku was very excited. She flew from the nest on a journey into the
world of animals.
Animals are of different kinds. Some live with us in our farms and homes
(domestic animals), some live in the forest (wild animals) and some in
water.
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Observe the farmer‛s house. What animals do you see?
These animals are found in and around our homes. We take care of them
and they help us in various ways. Such animals are called domestic animals.
Some domestic animals help us in our farm work. They are called farm
animals.
Chicku saw the farm and the farm animals. She introduced herself
and spoke to the animals.
“I am a sparrow. My name is Chicku”.
Ox: “Hello Chicku! I help to Ox Cow
plough the farm”.
Cow: “I give milk and my dung is
used as manure and fuel.
The farmer provides us a home
called a shed. My young one is
called a calf”.
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“Hello Chicku! I am a horse. People use
me to pull carts and for riding. They take
care of me. My home is called a stable.
This is my young one – a foal.
Do you know? I can sleep both lying down
and standing up”.
“Hello Chicku! I am a donkey. I am
grey in colour. People use me to carry
loads. This is my young one - a foal.
My home is a stable”.
Connect the animals to their homes and young ones by
drawing lines.
Stable
Shed
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Domestic Animals - Animals that give us.........
Some domestic animals give us food items like milk, eggs, meat and
honey; some give us wool and leather.
“Hello Chicku! I am a goat. This is my
young one-a kid. My home is a shed.
People rear us for our milk and meat.
They take us to graze”.
“Hello Chicku! I am a sheep.
My home is a shed.
My young one is a lamb.
I give wool. People use wool to make
sweaters, gloves and shawls. It keeps
them warm”.
“Hello Chicku! We are honey bees.
Our home is a beehive.
We live together in large numbers.
We make honey from flowers”.
“Hello Chicku, I am a hen.
My home is called a coop. My young
one is a chick. We are reared for our
eggs and meat. Turkeys and ducks are
also reared for their eggs and meat”.
Chicku said, “I feel happy to have met all of you.
Thank you and goodbye”. She flew away.
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Name the young ones.
Domestic Animals - Pet Animals
Some domestic animals live with us and share our lives. They are called
pet animals.
On the way to the forest, Chicku saw Surabhi and Semmalar with
their pet animals.
Surabhi “This is my cat and these are
her kittens. They live in our
home”.
“This is my dog and Semmalar
this is its puppy.
I keep them in a “I love my pets very
kennel in my house”. much. I feed them
and play with them.
They love me too. My
dogs wag their tails
when they see me.
I take them to the
doctor to keep them
healthy”.
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Do you have pet animals?
Talk about them with your teacher / friends.
Kinds of pet animals .........
Their names .........
Food that you give them .........
The way you take care of them .........
Fill in the blanks.
Sankar has two . and
three pets in all.
So Sankar has
Wild Animals
Chicku then entered a forest.
The forest is the home of wild animals.
“I am Chicku, a sparrow. May I know about you?”
“Hello Chicku! I am an
elephant. I love to play in
the water. This is my young
one, a calf”.
The elephant has a long trunk and big ears.
Some elephants have tusks. Tusks are a
different form of teeth.
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“Oh, what is this sound?
It makes me afraid”.
“It is the roar of the lion.
The lion‛s home is called a
den. Male lions have a mane”.
“Lions and tigers live in the
forest. Their young ones are
called cubs”.
“The tiger‛s home is called
a lair. Tigers have black
stripes on their body.
Some tigers are white in
colour”.
Chicku thanked the elephant and flew out of the forest.
Animal Facts Giraffe Cheetah
Snail
The Slowest Animal The Fastest Animal
The Tallest Animal
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Choose the right word and fill in the blanks.
a. Elephants have a .
(stripe / trunk)
b. are modified form of
teeth. (Tusks / Trunks)
c. They have eyes and
ears. (small / large)
Water Animals
On the way back to her nest, Chicku saw a pond and some water animals
in and around it.
Crane Fish Turtle
Frog
Crab
Chicku saw some fish, frogs, a turtle, crabs and a crane. Frog, crab and
turtle live both on land and in water.
The young one of a fish is called a fingerling and the young
one of a frog is a tadpole.
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Birds and Nests
Chicku also saw some birds and their nests.
Each bird‛s nest looks different. Birds use sticks, thorns, cotton and
fibre to build their nests. Some birds such as the woodpecker, owl and
parrot live in the holes in the tree trunks called hollows.
Weaver Bird Crow Owl Parrot
The cuckoo does not build a nest.
It lays its eggs in the nests of
other birds.
Chicku reached home. Ticku and mother were happy to see Chicku.
Chicku spoke about her experiences in the animal world.
Select the odd one and put a cross ( ) mark in the box.
a.
b.
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Evaluation
1. Connect the animals to their homes by drawing lines.
2. Are the animals in their homes?
Put a () mark if they are and a (x) mark if they are not.
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